Gaya APA
Hathway, L. (1980).
Fundamentals of Machine Operation Preventive Maintenance .
Moline USA:
John Deere Service Pubications.
Gaya MLA
Hathway, Louis.
"Fundamentals of Machine Operation Preventive Maintenance".
Moline USA:
John Deere Service Pubications,
1980.
Teksbook.